SOLUTION: Solve the following system of equations using the Gauss-Jordan method. -15x-2y+z=-18 20x+y=36 -10x-2y+z=-8

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Question 1087357: Solve the following system of equations using the Gauss-Jordan method.
-15x-2y+z=-18
20x+y=36
-10x-2y+z=-8
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!

Replace R%5B2%5D with 2R%5B3%5D%2BR%5B2%5D

Replace R%5B3%5D with 2R%5B1%5D-3R%5B3%5D

Replace R%5B2%5D with R%5B2%5D-2R%5B3%5D,

Replace R%5B1%5D with R%5B1%5D-R%5B3%5D,

Replace R%5B1%5D+with+%7B%7B%7B3R%5B1%5D-2R%5B2%5D,

Divide R%5B1%5D by %28-1%2F45%29, R%5B2%5D by %28-1%2F3%29,
%28matrix%283%2C4%2C%0D%0A1%2C0%2C0%2C2%2C%0D%0A0%2C1%2C0%2C-4%2C%0D%0A0%2C0%2C1%2C4%29%29